service/src/main/resources/mapper/TaPostMapper.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.yunzhi.demo.mapper.TaPostMapper">

    <select id="getPostStatis" resultType="com.yunzhi.demo.vo.StatisPost">
        SELECT
            *
        FROM
            (
            SELECT
                t.*,
                sum( IF ( s.serial_no IS NULL, 0, 1 ) ) AS p_v,
                count( DISTINCT s.person_id ) AS u_v,
                sum( IF ( m.serial_no IS NULL, 0, 1 ) ) AS saved_num
            FROM
                ta_post t
                LEFT JOIN ta_read_log s ON t.post_id = s.post_id
                LEFT JOIN ta_post_save m ON t.post_id = m.post_id
                AND m.`status` > - 1
            WHERE
                1 = 1
              <if test="startDate != null and startDate != ''">
                  AND s.create_date &gt;= DATE_FORMAT( #{startDate}, '%Y-%m-%d' )
                  AND m.create_date &gt;= DATE_FORMAT( #{startDate}, '%Y-%m-%d' )
              </if>
              <if test="startDate != null and startDate != ''">
                  AND s.create_date &lt;= DATE_FORMAT( #{endDate}, '%Y-%m-%d' )
                  AND m.create_date &lt;= DATE_FORMAT( #{endDate}, '%Y-%m-%d' )
              </if>
              <if test="typeId != null and typeId != ''">
                  AND t.type_id = #{typeId}
              </if>
              <if test="name != null and name != ''">
                AND t.name LIKE CONCAT('%', #{name}, '%')
              </if>
            GROUP BY
                t.post_id
            ) a
        ORDER BY
          <if test="asc != null and asc != ''">
            ${asc} ASC
          </if>
          <if test="desc != null and desc != ''">
            ${desc} DESC
          </if>
    </select>
</mapper>